نتایج جستجو برای: lewis protic acid
تعداد نتایج: 762593 فیلتر نتایج به سال:
The gas-phase structure of the conjugate base of p-hydroxybenzoic acid (and related compounds) and the influence of the solvent used in its generation by electrospray ionization have recently been under debate. While the phenoxide structure is known to be lower in energy in the gas phase, the carboxylate structure is favored in aqueous solution, fuelling the controversy. Here we probe the struc...
The novel organic salt 7-((5-bromo-1H-indol-3-yl)(4-methoxyphenyl)methyl)1,3,5-triaza-7-phosphaadamantan-7-ium tetrafluoroborate was synthesized from a Lewis acid (LA) and Lewis-base (LB) reaction between 1,3,5-triaza-7-phosphaadmantane 5-bromo-3-(4-methoxybenzylidene)-3-H-indol-1-ium (LA). obtained base adduct, being the title compound, analyzed validated by 1H, 13C, 31P, 19F 1D-NMR-spectrosco...
Formaldehyde (HCHO), as one of the main indoor toxic pollutions, presents a great threat to human health. Hence, it is imperative efficiently remove HCHO and create good living environment for people. Herein, layered perovskite material SrBi2Ta2O9 (SBT), was studied first time exhibited superior photocatalytic efficiency stability compared commercial TiO2 (P25). Furthermore, unique dark–light t...
We investigate the influence of tetrafunctional alkoxysilan R-groups, with a range sterics and electronics. This is through solvent free polysiloxane network formation under ambient conditions using Lewis acid catalysed Piers-Rubinsztajn (PR) reaction.
Boronic acids can interact with Lewis bases to generate boronate anions, and they can also bind with diol units to form cyclic boronate esters. Boronic acid based receptor designs originated when Lorand and Edwards used the pH drop observed upon the addition of saccharides to boronic acids to determine their association constants. The inherent acidity of the boronic acid is enhanced when 1,2-, ...
TMU-10 treated at 300 °C under air efficiently promotes H 2 generation ambient temperature from NaBH 4 . The enhanced catalytic activity derives a higher density of Lewis acid sites and the mesoporosity.
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